Fall hydroseeded lawn is thin/bare in spring
I live in NE Wisconsin (Zone 4). My yard was hydroseeded during the first week of November 2011. I watered 2x/day, religiously, for the first month. After a couple of weeks, some grass was visible before winter finally started. It has been a mild winter, not a lot of snow/ice/cold. However, it is now mid-April, and I still have not noticed a lot of change in my lawn, especially in the back of the house. I read that a hydroseeded lawn is usually thick enough to be cut 3-4 weeks after hydroseeding, however, I don't see how that will be possible with my lawn, because it is so thin and bare. Is this normal for lawns that were hydroseeded in late fall? Could the majority of the seed still be dormant? I should mention that we have already had a warm start to spring, with one week of temps in the 70's and 80's (that was about 3 weeks ago). Since then, the temps have been 30's (lows) - 60's (highs).
Any advice or comments would be greatly appreciated!